list the possible rationasl roots for h(x)=4^x4-5x^3

Answer 1

h(x)=4x^4-5x^3

h(x)=0

4x^4-5x^3=0

x^3(4x-5)=0

x=0 or 4x-5=0

x=5/4 is the root of the rational numer.